Experimental Demonstration of RoFSO Transmission Combining WLAN Standard and WDM-FSO over 100m Distance

In this demonstration, we design the integration of WLAN-based RF transmission and multi-wavelength FSO transmission, achieving 20Gbps. Two wavelength beams of 1549.322nm and 1550.124nm are modulated and used for WLAN-based MQAM OFDM signal by USRP and 10Gbps OOK signal by BERT. It is shown that when the received optical power is greater than –13dBm for multi-wavelength beams, the WDM-FSO system achieves the BER requirements of WLAN. Furthermore, for the 10Gbps OOK RF signal, the error-free condition of BER below 10
^-12
is obtained at the received optical power of -13dBm. Our experiments study the feasibility of integrating WDM-FSO with WLAN-based RF systems, noticing the potential of utilizing multiple wavelengths in RoFSO transmission.